HDFS-5945. Add rolling upgrade information to fsimage; and disallow upgrade and rolling upgrade to be started simultaneously. Contributed by szetszwo & jing9

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-5535@1569515 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES_HDFS-5535.txt

@@ -43,3 +43,6 @@ HDFS-5535 subtasks:
 
     HDFS-5920. Support rollback of rolling upgrade in NameNode and JournalNodes.
     (jing9)
+
+    HDFS-5945. Add rolling upgrade information to fsimage; and disallow upgrade
+    and rolling upgrade to be started simultaneously.  (szetszwo & jing9)

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImage.java

@@ -314,8 +314,9 @@ public class FSImage implements Closeable {
     return isFormatted;
   }
 
-  void doUpgrade(FSNamesystem target) throws IOException {
-    // Upgrade is allowed only if there are 
+  /** Check if upgrade is in progress. */
+  void checkUpgrade(FSNamesystem target) throws IOException {
+    // Upgrade or rolling upgrade is allowed only if there are 
     // no previous fs states in any of the local directories
     for (Iterator<StorageDirectory> it = storage.dirIterator(false); it.hasNext();) {
       StorageDirectory sd = it.next();
@@ -324,11 +325,16 @@ public class FSImage implements Closeable {
             "previous fs state should not exist during upgrade. "
             + "Finalize or rollback first.");
     }
+  }
+
+  void doUpgrade(FSNamesystem target) throws IOException {
+    checkUpgrade(target);
 
     // load the latest image
 
     // Do upgrade for each directory
     this.loadFSImage(target, StartupOption.UPGRADE, null);
+    target.checkRollingUpgrade("upgrade namenode");
     
     long oldCTime = storage.getCTime();
     storage.cTime = now();  // generate new cTime for the state

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImageFormatProtobuf.java

@@ -42,7 +42,6 @@ import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdfs.protocol.LayoutVersion;
 import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CacheDirectiveInfoProto;
 import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CachePoolInfoProto;
 import org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenSecretManager;
@@ -279,6 +278,9 @@ public final class FSImageFormatProtobuf {
       fsn.setGenerationStampV1Limit(s.getGenstampV1Limit());
       fsn.setLastAllocatedBlockId(s.getLastAllocatedBlockId());
       imgTxId = s.getTransactionId();
+      if (s.hasRollingUpgradeStartTime()) {
+        fsn.setRollingUpgradeInfo(s.getRollingUpgradeStartTime());
+      }
     }
 
     private void loadStringTableSection(InputStream in) throws IOException {
@@ -519,6 +521,9 @@ public final class FSImageFormatProtobuf {
       // from the actual saver thread, there's a potential of a
       // fairness-related deadlock. See the comments on HDFS-2223.
       b.setNamespaceId(fsn.unprotectedGetNamespaceInfo().getNamespaceID());
+      if (fsn.isRollingUpgrade()) {
+        b.setRollingUpgradeStartTime(fsn.getRollingUpgradeInfo().getStartTime());
+      }
       NameSystemSection s = b.build();
       s.writeDelimitedTo(out);
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImageUtil.java

@@ -25,7 +25,6 @@ import java.util.Arrays;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdfs.protocol.LayoutVersion;
 import org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature;
 import org.apache.hadoop.hdfs.server.namenode.FSImageFormatProtobuf.Loader;
 import org.apache.hadoop.hdfs.server.namenode.FsImageProto.FileSummary;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java

@@ -200,7 +200,6 @@ import org.apache.hadoop.hdfs.server.common.Storage.StorageDirType;
 import org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory;
 import org.apache.hadoop.hdfs.server.common.Util;
 import org.apache.hadoop.hdfs.server.namenode.FsImageProto.SecretManagerSection;
-import org.apache.hadoop.hdfs.server.namenode.FsImageProto.SecretManagerSection.PersistToken;
 import org.apache.hadoop.hdfs.server.namenode.INode.BlocksMapUpdateInfo;
 import org.apache.hadoop.hdfs.server.namenode.JournalSet.JournalAndStream;
 import org.apache.hadoop.hdfs.server.namenode.LeaseManager.Lease;
@@ -4512,7 +4511,6 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
     readLock();
     try {
       checkOperation(OperationCategory.UNCHECKED);
-      checkRollingUpgrade("save namespace");
 
       if (!isInSafeMode()) {
         throw new IOException("Safe mode should be turned ON "
@@ -7146,6 +7144,7 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
       final String action = "start rolling upgrade";
       checkNameNodeSafeMode("Failed to " + action);
       checkRollingUpgrade(action);
+      getFSImage().checkUpgrade(this);
 
       getFSImage().saveNamespace(this, NameNodeFile.IMAGE_ROLLBACK, null);
       LOG.info("Successfully saved namespace for preparing rolling upgrade.");
@@ -7167,12 +7166,16 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
     rollingUpgradeInfo = new RollingUpgradeInfo(blockPoolId, startTime);
   }
 
+  RollingUpgradeInfo getRollingUpgradeInfo() {
+    return rollingUpgradeInfo;
+  }
+
   /** Is rolling upgrade in progress? */
   public boolean isRollingUpgrade() {
     return rollingUpgradeInfo != null;
   }
 
-  private void checkRollingUpgrade(String action) throws RollingUpgradeException {
+  void checkRollingUpgrade(String action) throws RollingUpgradeException {
     if (isRollingUpgrade()) {
       throw new RollingUpgradeException("Failed to " + action
           + " since a rolling upgrade is already in progress."
@@ -7197,13 +7200,13 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
 
       returnInfo = new RollingUpgradeInfo(blockPoolId,
           rollingUpgradeInfo.getStartTime(), now());
-      getFSImage().purgeCheckpoints(NameNodeFile.IMAGE_ROLLBACK);
       rollingUpgradeInfo = null;
       getEditLog().logFinalizeRollingUpgrade(returnInfo.getFinalizeTime());
+      getFSImage().saveNamespace(this);
+      getFSImage().purgeCheckpoints(NameNodeFile.IMAGE_ROLLBACK);
     } finally {
       writeUnlock();
     }
-    getEditLog().logSync();
 
     if (auditLog.isInfoEnabled() && isExternalInvocation()) {
       logAuditEvent(true, "finalizeRollingUpgrade", null, null, null);

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeLayoutVersion.java

@@ -63,7 +63,7 @@ public class NameNodeLayoutVersion {
    * </ul>
    */
   public static enum Feature implements LayoutFeature {
-    ROLLING_UPGRADE_MARKER(-52, "Upgrade marker for rolling upgrade");
+    ROLLING_UPGRADE(-52, "Support rolling upgrade");
     
     private final FeatureInfo info;
 

hadoop-hdfs-project/hadoop-hdfs/src/main/proto/fsimage.proto

@@ -70,6 +70,7 @@ message NameSystemSection {
   optional uint64 genstampV1Limit = 4;
   optional uint64 lastAllocatedBlockId = 5;
   optional uint64 transactionId = 6;
+  optional uint64 rollingUpgradeStartTime = 7;
 }
 
 /**

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSUpgrade.java

@@ -35,11 +35,15 @@ import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hdfs.protocol.HdfsConstants;
+import org.apache.hadoop.hdfs.protocol.HdfsConstants.RollingUpgradeAction;
+import org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction;
 import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.NodeType;
 import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.StartupOption;
+import org.apache.hadoop.hdfs.server.common.InconsistentFSStateException;
 import org.apache.hadoop.hdfs.server.common.Storage;
 import org.apache.hadoop.hdfs.server.common.StorageInfo;
 import org.apache.hadoop.hdfs.server.namenode.TestParallelImageWrite;
+import org.apache.hadoop.ipc.RemoteException;
 import org.apache.hadoop.util.StringUtils;
 import org.junit.BeforeClass;
 import org.junit.Ignore;
@@ -214,7 +218,7 @@ public class TestDFSUpgrade {
    * This test attempts to upgrade the NameNode and DataNode under
    * a number of valid and invalid conditions.
    */
-  @Test
+  @Test(timeout = 60000)
   public void testUpgrade() throws Exception {
     File[] baseDirs;
     StorageInfo storageInfo = null;
@@ -227,6 +231,19 @@ public class TestDFSUpgrade {
       log("Normal NameNode upgrade", numDirs);
       UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current");
       cluster = createCluster();
+
+      // make sure that rolling upgrade cannot be started
+      try {
+        final DistributedFileSystem dfs = cluster.getFileSystem();
+        dfs.setSafeMode(SafeModeAction.SAFEMODE_LEAVE);
+        dfs.rollingUpgrade(RollingUpgradeAction.START);
+        fail();
+      } catch(RemoteException re) {
+        assertEquals(InconsistentFSStateException.class.getName(),
+            re.getClassName());
+        LOG.info("The exception is expected.", re);
+      }
+
       checkNameNode(nameNodeDirs, EXPECTED_TXID);
       if (numDirs > 1)
         TestParallelImageWrite.checkImages(cluster.getNamesystem(), numDirs);

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestRollingUpgrade.java

@@ -18,6 +18,7 @@
 package org.apache.hadoop.hdfs;
 
 import java.io.File;
+import java.io.IOException;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
@@ -27,15 +28,13 @@ import org.apache.hadoop.fs.FileUtil;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hdfs.server.datanode.DataNode;
 import org.apache.hadoop.hdfs.protocol.HdfsConstants.RollingUpgradeAction;
-import org.apache.hadoop.hdfs.protocol.RollingUpgradeException;
+import org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction;
 import org.apache.hadoop.hdfs.protocol.RollingUpgradeInfo;
 import org.apache.hadoop.hdfs.qjournal.MiniJournalCluster;
 import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.RollingUpgradeStartupOption;
 import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.StartupOption;
-import org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter;
 import org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode;
 import org.apache.hadoop.hdfs.tools.DFSAdmin;
-import org.apache.hadoop.ipc.RemoteException;
 import org.apache.hadoop.util.ExitUtil;
 import org.apache.hadoop.util.ExitUtil.ExitException;
 import org.junit.Assert;
@@ -100,9 +99,13 @@ public class TestRollingUpgrade {
         Assert.assertTrue(dfs.exists(foo));
         Assert.assertTrue(dfs.exists(bar));
         Assert.assertTrue(dfs.exists(baz));
+
+        dfs.setSafeMode(SafeModeAction.SAFEMODE_ENTER);
+        dfs.saveNamespace();
+        dfs.setSafeMode(SafeModeAction.SAFEMODE_LEAVE);
       }
 
-      cluster.restartNameNode();
+      cluster.restartNameNode("-rollingupgrade", "started");
       {
         final DistributedFileSystem dfs = cluster.getFileSystem();
         Assert.assertTrue(dfs.exists(foo));
@@ -182,24 +185,6 @@ public class TestRollingUpgrade {
         Assert.assertEquals(info1, dfs.rollingUpgrade(RollingUpgradeAction.QUERY));
   
         dfs.mkdirs(bar);
-        
-        //save namespace should fail
-        try {
-          dfs.saveNamespace();
-          Assert.fail();
-        } catch(RemoteException re) {
-          Assert.assertEquals(RollingUpgradeException.class.getName(),
-              re.getClassName());
-          LOG.info("The exception is expected.", re);
-        }
-
-        //start checkpoint should fail
-        try {
-          NameNodeAdapter.startCheckpoint(cluster.getNameNode(), null, null);
-          Assert.fail();
-        } catch(RollingUpgradeException re) {
-          LOG.info("The exception is expected.", re);
-        }
       }
 
       // cluster2 takes over QJM
@@ -231,8 +216,15 @@ public class TestRollingUpgrade {
       Assert.assertTrue(dfs2.exists(bar));
       Assert.assertTrue(dfs2.exists(baz));
 
+      //restart cluster with -upgrade should fail.
+      try {
+        cluster2.restartNameNode("-upgrade");
+      } catch(IOException e) {
+        LOG.info("The exception is expected.", e);
+      }
+
       LOG.info("RESTART cluster 2 with -rollingupgrade started again");
-      cluster2.restartNameNode();
+      cluster2.restartNameNode("-rollingupgrade", "started");
       Assert.assertEquals(info1, dfs2.rollingUpgrade(RollingUpgradeAction.QUERY));
       Assert.assertTrue(dfs2.exists(foo));
       Assert.assertTrue(dfs2.exists(bar));

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/protocol/TestLayoutVersion.java

@@ -78,7 +78,7 @@ public class TestLayoutVersion {
   @Test
   public void testNameNodeFeature() {
     assertTrue(NameNodeLayoutVersion.supports(LayoutVersion.Feature.CACHING,
-        NameNodeLayoutVersion.Feature.ROLLING_UPGRADE_MARKER.getInfo().getLayoutVersion()));
+        NameNodeLayoutVersion.Feature.ROLLING_UPGRADE.getInfo().getLayoutVersion()));
   }
   
   /**